Cope.] ■'-"•^ [March 4, 



On Ti((,x)orus, o- Neio Ge/ias of TeiidcB. 



By E. D. Cope. 



{Bead before tlie American Philosophical Society, March 4, 1892.) 



TiAPOKUS FULiGiNOSUS, gen. et sp. nov. 



Char. gen. — Tongue cylinclric and sheathed at the base ; no femoral 

 pores ; abdominal scales smooth ; a cervical collar fold ; tail cylindric. 

 Digits 5-5. 



Tliis form is identical with Amiva, except in the absence of femoral 

 pores. Monoplocus Gthr. has no femoral pores, but the tongue is not 

 sheathed, and the abdominal scales are keeled. 



Char, specif. — The squamous surface of the tongue is ovate posteriorly 

 and not notched. The apex of the tongue is deeply bifurcate. The teeth 

 of the maxillary bone are compressed, and have a principal compressed 

 apex, and one or two denticles of the edges near the base. The rosettes 

 of scales, which in other genera surround the femoral pores, are present, 

 but the pores are absent. 



The animal is about the size of the Amiva corvina Cope. The dorsal 

 scales are minute, measuring .03 mm. The abdominal plates are in 

 twelve longitudinal and thirty-two transverse rows. They are smooth, 

 and those of the external row are smaller than the others. The nostril 

 is on the suture between the nasal plates. The parietals axe divided into 

 two and sometimes into three plates, the internal of which is wider than 

 the interparietal. The latter is smaller than each frontoparietal. Supra- 

 orbitals, four ; supraciliaries, six ; no freuoorbital. Head rather elongate 

 and acuminate ; labials | ; infralabials, three large and two small, sepa- 

 rated from labials by two rows of large scales. A few rows of scales on 

 the middle of the mesoptychium equal those of the gular region, which 

 are a little larger than those of the neck, which are equal to those on the 

 posterior part and edge of the gular fold. The brachial scales are not 

 large, and are in three or four rows, separated by small scales from a few 

 small postbrachial scales near the elbow. The antebrachial scales are not 

 continuous with the brachials, and are in one large external and two or 

 three smaller internal rows. No postantebrachials. Femorals in 13-14 

 rows ; the third from the front large ; the posterior six rows not imbri- 

 cate. Tibial scales in five rows, the external much larger. Anal plates 

 with five or six large marginals, and five in front of them, four arranged 

 round a small central one. Caudal scales narrow, numerous, not oblique, 

 keeled, but not uncinate. No spurs. 



Color above brown, sometimes with a lead-colored shade. Below lead 

 color, with an olive tinge, to nearly black. A blacic band from temporal 

 region to above femur present in all the specimens. In three specimens 

 there are traces of one or two brown bands on the middle dorsal region 



